Activity Listings

Letter from Dan H. Campbell, Responsible Investigator, OEMcmr-153, to Dr. A. N. Richards, Committee on Medical Research. RE: Asks if they should plan on an extension of their contract. Would like to know if they consider the two yearly reports as part of the final report. Informs him that he plans to be in Washington and Philadelphia in January. [Filed under LP Science: Assorted LP War Work, 1940-1946: Box #13.006 Folder #6.1]

Letter from LP to Prof. Warren Johnson, Chemistry Dept., University of Chicago, RE: Describes Dr. Arthus J. Stosick's relevant education and experience. Gives Stosick a strong recommendation in case there is an opening at the University of Chicago. [Filed under LP Correspondence: #369.5]

Letter from Linus Pauling Jr to AHP RE: Describes the ship he is on and how it different it is from what he thought it would be. Says he will have to make a long voyage to India. Asks about the family and tells her he can't pay back the money yet, discusses when he will be able to. [Filed under LP Biographical: Personal & Family, Family Correspondence: Linus Carl Pauling, Jr. 1946-1956: Box #5.037, Folder 37.1]

Letter from M. H. Averson, Chairman, Chicago Section, to Members of the Jury. RE: Informs them of the nominees for the 35th Willard Gibbs Award. Encloses a ballot. [Filed under LP Science: American Chemical Society: Materials re: Committees and Awards, 1948-1951, 1967: Box #14.010 Folder #10.7]

Letter from Secretary to LP, to Miss Elsie Wince. RE: Acknowledges the arrival of the books sent to LP. [Filed under LP Science: American Chemical Society: Correspondence, 1943-1948: Box #14.003 Folder #3.3]

Note from Dr. Raymond. J. Woodrow to LP RE: Explains that his wife has contracted polio, and he has heard that LP knows another type of treatment for the disease, requests any indication of methods which could help cure her. (Handwritten notes, bottom of letter, on how a person should be taught to coordinate muscles, develop control, mentions Kenny method, and relates to amount of nerve fibers left.) [Letter from LP to Woodrow December 4, 1945] [Filed under LP Correspondence: 443.13]

Note from Dr. W. Nowacki, Universität Bern to LP RE: Sends a paper on the crystal structure of adamantan. Requests LP send reprints to Switzerland again as he did before the war. Also requests those reprints from 1940-45. [Letter from LP to Nowacki December 19, 1945] [Filed under LP Correspondence: Box #277.15, file:(Nowacki, Werner)]

Listed below with mention of their respective contributions are the personnel who are employed under Contract OEMsr-103, and Supplement No. 1 thereto, entitled "Development of an instrument for the rapid determination of particle-size distribution of smokes".

1. Professor Linus Pauling, Official Investigator throughout the life of the contract, was asked by Dr. J.B. Conant in a letter dated June 13, 1941, to give his attention to the "old problem of measurement of particle size and particle-size distribution, .... particularly along the lines of portable instruments which might be developed for the particular purpose of testing smoke clouds." Professor Pauling relied on June 18, 1941 by proposing the type of instrument which became the subject of Contract OEMsr-103. The subsequent work followed closely along the path outlined in this original discussion.

2. Professor J.H. Sturdivant was responsible for the supervision of the experimental work and the detailed design of the instrument throughout the period of the contract.

3. Mr. William N. Lipscomb, Jr., employed from June 7, 1942 to June 30, 1943, contributed greatly to the development of the instrument. He produced multidisperse, stable smokes for testing the instrument, compared several arrangements for charging the particles, investigated with the electron microscope the separation of particle sizes by the instrument, and examined the precipitation process mathematically.

[2]

4. Dr. Thor R. Rubin, employed from February 23 to September 30, 1942, studied unidisperse smokes for testing the instrument, assembled and put into operation the first instrument, and improved the airflow through it to obtain a steady pencil of smoke.

5. Dr. Eugene H.Eyster, employed October 1 to December 31, 1941, searched the literature, uncovered the parallel experiments of Rohmann, and prepared a vacuum-tube electrometer for use in the instrument.

6. Dr. Austin L. Wahrhaftig, employed December 1, 1941 to February 28, 1942, constructed the power supply for charging and deflecting the smoke stream.

8. Mr. George Standart, employed part time between November, 1942, and May, 1943, assisted Mr. Lipscomb.

The work of Contract OEMsr-103 covered the design and investigation of an instrument in which the particles in a smoke stream could be charged electrically and precipitated on a collector at positions correlated with the sizes of the particles. A theoretical analysis showed that the function relating locus of precipitation to particle size is double-valued; the distribution is turned back upon itself in such a way that the smallest particles precipitate with the largest. The agreement between theory and experiment is fairly good, but the range of sizes of the particles precipitated at a given point is rather large. It was concluded that possible the precipitation apparatus could be developed into a usable laboratory instrument, but that it could hardly be perfected for field use.

I hope that this letter provides the information you desire for the history of Division 10 activities. Please let me know if further details on OEMsr-103 are needed.